import java.util.Collection;
import java.util.List;
import java.util.Scanner;
import java.util.TreeSet;

public class 学生成绩 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        TreeSet<Integer> studentId = new TreeSet<>();
        TreeSet<String> studentName = new TreeSet<>();
        TreeSet<Integer> studentAge = new TreeSet<>();
        System.out.println("id");
        studentId.add(Integer.valueOf(sc.nextLine()));
        System.out.println("name");
        studentName.add(sc.nextLine());
        System.out.println("age");
        studentAge.add(Integer.valueOf(sc.nextLine()));
        System.out.println("id为:"+studentId.first());
        System.out.println("名字为:"+studentName.first());
        System.out.println("年纪:"+studentAge.first());

    }
}
